Combination-lock.



G. H. GOHN.

COMBINATION LOOK.

APPLICATION FILED JUNE 19, 1908.

Patented Jan. 19, 1909.

2 SHEETS-SHEET 1.

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G. H. GOHN.

. COMBINATION LOOK.

APPLICATION nun mm. 19. 1908.

Patented Jan. 19-; 1909.

2 SHEETS-SHEET 2.

WITNESSES lNVENTOH A TTOHNEYS 1'": NORRIS PETERS c0" WISMINOION, n. c

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COMBINATION-LOCK.

Specification of Letters Patent.

Patented Jan. 19, 1909.

Application filed June 19, 1908. Serial No. 439,330.

To all whom it may concern:

Be it known that I, CHARLES H. COHN, a citizen of the United States, and a resident of the city of New York, borough of Manhattan, in the county and State of New York, have invented a new and Improved Combination-Lock, of which the following is a full, clear, and exact description.

This invention relates to combination locks.

An object of this invention is to produce a lock of this class which shall be of simple construction which can be readily operated by tl11'0\ 'ing the bolt, and having im roved means for holding the bolt in its loc red or unlocked position.

A further object of the invention is to construct the parts in such a way that the case of the lock containing the lock mechanism, may be readily removed and replaced in position and in connection with the operating members of the knob which controls the operation of the lock.

The invention consists in the construction and combination of parts to be more fully described hereinafter and particularly set forth in the claims.

Reference is to be had to the accompanying drawings forming a part of this specification in which similar characters of reference indicate corresponding parts in all the figures.

Figure 1 is a side elevation of a lock, the inner covering being removed and certain parts being shown in cross section, this view showing the bolt in its locking position; 1* ig. 2 is a View similar to Fig. 1, but showing the bolt in its withdrawn or unlocked position; Fig. 3 is a cross section through the lock, taken on the line 33 of Fig. 6, that is, this section is taken at the inner side of the case looking outward; Fig. 1 is an elevation of the lock showing the lock case, and illustrating the manner in which it may be connected with the operating knob; Fig. 5 is a side elevation of the knob plate, and also showing the keeper and the manner in which the bolt cooperates therewith; Fig. 6 is a vertical section through the lock and door to which it is applied; Fig. 7 is a side elevation of the tumbler shaft and showing the tumblers; Fig. 8 is a side elevation of one of the tumblers; Fig. 9 is a side elevation of another tumbler; and Fig. 10 is a fragmentary section on the line 1010 of Fig. 1, showing a detent spring which holds the tumblers in diiferent positions in which they are placed.

Referring more particularly to the parts, and especially to Figs. 1 to 3, and Fig. 6, 1 represents the case of the lock which is in the form of a box, applied to the inner side of the door 2. This case is provided with a cover plate 3 seating on lugs 1 which are illustrated in Fig. 2. \Vithin the case 1, a tumbler shaft or arbor 5 is rotatably mounted, one end of the said shaft being received in a recess 6 in the wall of the case, while the other end is received in an opening 7 in the cover plate 3.

Referring now to Fig. 7, on the arbor 5, there is provided a rigid tumbler or main tumbler S, wliich is disposed adjacent the door 2; near the other end of the tumbler arbor a star wheel 9 is rigidly attached. From the face of the main tumbler 8, a dog 10 projects toward the star wheel 9, and this dog passes through circul'nferential slots 11 and 11 which are formed in the movable tumblers 12 and 13. These tumblers are loosely mounted on the arbor between the main tumbler 8 and the star wheel 9, as indicated by the dotted lines in Fig. 7. On the side of the case at a suitable point, a detent spring 1 1 is attached, and this spring is split so as to form two lingers 15 and 16, as shown in Fig. 10. These fingers engage the edges of the tumblers, as indicated in Fig. 2, so as to hold the tumblers in the position in which they are set in opening the lock. On the tumbler arbor, a collar 17 is rotatably mounted between the main tumbler 8 and the cover plate 3, and this collar is provided with a driving toe 18 and a lock toe 19. The inner end of the arbor 5 is provided with a diametrically disposed slot 20, as indi cated in Fig. 7.

In axial alinement with the arbor 5, I provide a knob or thumb head 21, which is the handle of a tubular stem 23 to which it is rigidly attached through the medium of a reduced neck 22. This stem extends inwardly to the inner face of the door, and is provided with a diametrically disposed cross bar 24, as indicated in Fig. 5. Rotatably mounted on the stem 23, I provide a sleeve 25, which is rotatably mounted in an escutcheon 26, which is attached to the outer side of the door. 011 the inner end of this sleeve 25, a ring 27 is attached, said ring being provided with a shoulder 28 which is countersunk into a knob plate 29, the said knob plate being countersunk on the inner face of the door, as shown. Beyond this shoulder 28, the ring 27 is provided with a dog 30 which projects into the interior of the case through a slot 31 (see Fig. 4), formed in the cover plate. This dog 30 is adapted to engage the driving toe 18 so as to rotate the collar 17 by means of the knob 21, when the bolt is being withdrawn.

As shown in Fig. 6, the inner end of the stem 23 is enlarged so as to form a collar 32, and between this collar and the end of the sleeve 25, a space is left which allows a limited sliding movement of the stem within the sleeve, as will be readily understood. The sleeve 25 extends out to the inner face of the knob 21, and is provided with lugs 33 which project outwardly, as shown, and these lugs are adapted to be engaged by stop pins 34 which project inwardly from the inner face of the knob. These pins 34 are quite short so that if the stem is pulled outwardly by means of the knob, the pins 3- 1 will clear the lugs 33 so that the knob may be rotated without rotating the sleeve. Contrariwise, if the knob 21 is in the position shown, the pins 34: will engage the lugs and prevent the rotation of the stem without rotating the sleeve. As indicated, the edges of all the tumblers are provided with inclined notches or slots 35. 7

Referring now especially to Fig. 2, in the lower part of the case, a bolt 36 is pivotally mounted on a pivot stud 37, the ends of which. stud are rotatably mounted in the cover plate 3 and the wall of the case, as shown in Fig. 6. Thisbolt projects through a bolt opening. 38 in the side wall of the case, and this opening is elongated so as to permit the bolt to rotate on its pivot, as will be readily understood. From the upper edge of the bolt 36, an inclined spur or wing 39 "extends upwardly, and near this spur, a finger 40 projects vertically. This finger is adapted to be engaged by the lock toe 19 as to rotate the bolt on the pivot 37, as indicated in Fig. 2. This rotation can only take place when all of the notches 35 of the tumblers are in alinement, as indicated in Fig. 2. From the upper edge of the bolt a guard finger 41 extends upwardly, and this guard finger closes the upper part of the bolt opening when the bolt is in its locked or horizontal position, as indicated in Fig. 1. The bolt is normally constrained toward its locking position by means of a leaf spring 42 which is attached to a fixed stud 43 on the cover plate. This spring thrusts against a pin id on the side of the bolt, as indicated.

In order to cause the arbor 5 to advance by a step-by-step-movement, I provide a. detent spring 15 which cotiperates with the star wheel 9. As indicated in Fig. 3, this spring is mounted in a fixed post 16 and projects radially toward the axis of the arbor. This spring is straight and engages, as shown, in the notches between the teeth of the star wheel 9. Evidently this spring will tend to arrest the star Wheel in the position shown, that is, with one of the notches between its teeth disposed at the spring. On the lower edge of the bolt, a short horizontal tongue 17 is provided, and opposite to this tongue, a button 48 is rotatably mounted in the wall of the case. This button has a wing head 29 for rotating the same on the outside of the case, and on the'inside of the case an enlarged head 50 is formed. This head is of oblong form, as shown in Fig. 3, and provided near one edge with a short locking stud 51 which projects toward the bolt. On the opposite edge, a long stud or unlocking stud 52 is provided, which projects under the bolt, as indicated. When the bolt is in its locking position as indicated in Fig. 3, this button 48 may be rotated so as to bring the locking stud 51 over the tongue 17, as shown. The stud then lies in the path of the tongue and prevents the bolt from being moved upwardly. In this way the lock. may be fastened from the inside so that it cannot be unlocked from the outside even by using the combination. If, however, the button 18 is rotated into the opposite position, as inclicated in Fig. 2, the unlocking stud 52 will engage the lower edge of the bolt and lie in. the path of the bolt so as to prevent its being returned to its locking position. Evidently, if the combination has been set on the tumblers, this button 4-8 may be used to throw the bolt from the inside, the bolt then rotating simply as an ordinary latch. In the wall of the case 1,. a stop pin 53 is mounted. This pin is encircled by a spring 54 which seats against the wall of the case and thrusts against a collar 55 and tends to hold the pin with its inner end projecting into the interior of the case and into the path of the teeth of the star wheel. Gn the exterior of the case, the stem 53is provided with a wing head 56 which enables it to be withdrawn, and this wing head is provided with nibs 57' on its inner edge, which are adapted to engage with the outer face of a boss 58 when the stem is rotated to a small angle. In this way the nibs 57 will hold the stem in a slightly withdrawn position'so that its inner end will clear the star wheel.

Referring to Fig. 5, the bolt 36 is adapted 12 to cooperate with a keeper 59, the said keeper being attached to the face of'the jamb 60, as shown;- The upper part of the keeper has notch 61 through which the bolt may pass when in its elongated or inclined position.

understood. On the outer side. of the knob 21, at asuitable point, a mark or projection 63 is provided, which indicates the position of the cross bar 2 1. This projection is useful in indicating the point from which the rotation of the knob will begin in applying the combination of the lock.

The mode of operation of the lock will now be described: By rotating the knob 21 from a certain definite position indicated by the projection 63, the rotation of the knob is imparted to the arbor 5. The dog 10 will then advance the tumbler 13 in the longest slot 11 to the proper position determined by the combination. The amount of advance which has been given to this tumbler is indicated constantly by the clicking of the spring as over the teeth of the star wheel. The next tumbler 12 being set over to the proper position by an opposite rotation of the knob, the knob is then rotated back to the proper position to bring the notch of the main tumbler 8 in alinement with the other notches of the tumblers. It should be understood that before rotating the knob to set the combination, it is necessary to pull it out slightly so as to remove the path of the pins 3-1- from the lugs This of course permits the free rotation of the stem independently of the sleeve 25. After the combination has been set as suggested, the knob 21 is pushed inwardly so that when rotated th pins 3% will engage the lugs 3 and rotate the sleeve. The sleeve is then rotated in the proper direction so that the dog 3-0 will engage the too 18 and advance the same toward the right, as indicated in Fig. 2. This rotates the collar 17 and advances the toe 19 against the finger 450 of the bolt. This rotates the bolt upwardly on its pivot, and this rotation is permitted by reason of the fact that the slots 35 will all be in alinement opposite to the spur 39, so t lat the spur 39 can pass upwardly into the slots, as indicated. As shown in Fig. 1, the end of the spur 39 lies close to the edges of the tumblers, so that if the slots 35 are not alining, as suggested, the bolt cannot be thrown upwardly. After the bolt has been drawn to its unlocked position it may be secured by the button 18 as described above. A person on "the interior may set the stop pin 53 so that it cooperates with the star wheel 9, so as to prevent the opening of the lock from the exterior even by use of the combination.

In pulling the knob 21 outwardly, it should be understood that the bar 24 slides outwardly in the slot 20, but does not become removed from the slot. In this connection attention is called to Fig. 6, wherein the end of the tumbler shaft is represented as projecting into the inner end of the tubular stem 23. In this way a sliding connection between the stem and the shaft is effected, but the rotation of the stem is always communicated to the tumbler shaft. For this reason it should be understood that in the unlocking movement of the bolt, the tumblers also rotate. This rotation of the tumblers made possible by forming the inner ends of the slots with enlargements 35. These enlargements form clearance for the inner end of the spur or wing 39.

Having thus described my invention, I claim as new and desire to secure by Letters Patent,

1. In a combination lock, a case, a tumbler shaft rotatably mounted in said case, a plurality of tumblers carried thereby, a knob, means actuated by said knob to set said tumblers, a pivoted bolt projecting from said case and normally held against rotation by said tumblers, and a rotatable member actuated by said knob after said tumblers are set to the combination, said rotatable member having a projecting toe engaging said bolt to actuate the same.

2. In a combination look, a case, a tumbler shaft mounted therein, a plurality of tumblers carried thereby, a knob, means actuated by said knob for advancing said tumblers to set the combination of the look, a pivoted bolt projecting from said case and normally held against rotation by said tumblers, a loose collar on said tumbler shaft, means for actuating said collar by said knob after the combination is set, and a member carried by said bolt adapted to be engaged by a part of said collar to throw said bolt.

3. In a combination look, a case, a tumbler shaft rotatably mounted therein, a plurality of tumblers carried by said tumbler shaft, a knob, means actuated thereby for rotating said tumbler shaft to set said tumblers to the combination, a pivoted bolt normally locked against movement by said tumblers, means for rotating said bolt on its pivot operated by said knob when the combination is set, and means whereby the rotation of said knob in actuating said bolt rotates said tumblers.

4. In a combination lock, a case, a tumbler shaft mounted in said case, a plurality of tumblers mounted upon said tumbler shaft, a knob having a stem having a sliding connection with said tumbler shaftand adapted to rotate the same, a bolt, means for actuating said bolt by a rotation of said knob when in its innermost position, and means for setting said tumblers by said knob when in its withdrawn position.

5. In a combination look, a case, a tumbler shaft rotatably mounted therein, a plurality of tumblers mounted on said shaft and having notches in the edges thereof adapted to be alined, a knob, means actuated by said knob for setting said tumblers to the combination, a pivoted bolt having a spur lying opposite to said notches when the combination is set, and a projecting member independent of said tumblers for rotating said bolt, engaging said bolt and actuated by said knob after the combination is set.

6. In a combination lock, a case, a tumbler shaft rotatably mounted therein, a stem having a sliding connection with said tumbler shaft and adapted to rotate the same, a plurality of tumblers carried by said tumbler shaft, a loose sleeve on said stein, means whereby the stem nay rotate said sleeve, a pivoted bolt having a spur lying near the edges of said tumblers and normally locked against movement, said tumblers having notches adapted to aline with said spur when the combination is set, and means actuated by said sleeve for moving said bolt.

7. In a combination look, a case, a tumbler shaft rotatably mounted therein and having a slot in he inner end thereof, a plurality f tumblers mounted on said tumbler shaft, a rotatable stem having a cross bar disposed in said slot whereby said stem may be moved relatively to said shaft and rotate the same, a sleeve on said stem adapted to enwith said stem to be rotated by said stem when said stem is in its innermost position, said stem being adapted to be disengaged from sleeve when drawn outwardly, a pivoted bolt normally locked by saic. tumblers, said tumblers releasing said bolt when set to the combination, and means for actuating said bolt by said sleeve.

8. in a combination look, a case, a tumbler shaft rotatably mounted therein, a plurality of tumblers mounted upon shaft, a rotatable stem having sliding e: with said shaft and adapted to same, a sleeve which may rotate said stem, means whereby stem may engage with said sleeve to rotate the same, a collar on said shaft, a dog carried by said sleeve engaging said collar to rotate the same, a bolt normally locked and released by said tumblers when said tumblers are setto the combination, and means for actuating said bolt from said collar.

9. in a combination look, a case, a tumbler shaft rotatably mounted therein, a pinrality of tumblers mounted upon said shaft, a rotatable stem having sliding engag ment with said shaft and adapted to rotate the same, a sleeve loose around said stein, means whereby said stem may engage with said normally locked by said tumblers and released only when said tumblers are set to the combination, means for actuating said bolt from said collar, and a cover plate for said case, said cover plate having a slot therein through which said dog projects.

10. in a combination lock, case, a tumbler shaft rotatably mounted therein, a pluy of tumblers mounted upon said shaft, a rotatable stein having sliding engagement with said shaft and adapted to rotate the same, a sleeve loose around said stem, means whereby said stem may engage with sleeve rotate the same, a collar on shaft, a dog carried by said sleeve eng said collar to rotate the same, a bolt aopted to open only when said tumblers are set to the combination, means for actuating said bolt from said collar, and a cover plate for said case, said cover plate having a slot therein through which said dog projects, said case and said cover plate affording means for supporting said shaft. 11. in a look, apivoted bolt, means for rotating said bolt on the pivot thereof, and a rotatable button having a locking stud adapted to engage said bolt to hold the same in its locked position, said button having an unlocking stud adapted to engage said bolt to hold the same in its unlocked position.

12. in a lock, a bolt mounted upon a pivot, means for actuating said bolt, said bolt having a tongue on the side thereof, and a rotatable button having a locking stud adapted to project over said tongue in one position of said button to hold said bolt in its locked position, said button further having an unlocking stud projecting under said bolt and adapted to hold the same in its unlocked position.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

onannns 11. (JOHN.

Witnesses Isaac OLswANo, lsinon M. KULIK. 

